Urine & CSF

Uric acid (24-h urine) unit converter

Uric acid excreted in 24-hour urine (gout and kidney stone workup)

Converter

Enter a value in any unit and all other units fill in.

mmol/24 h mg/24 h

Worked example

3 mmol/24 h (middle of the reference range) = 504 mg/24 h

Conversion formulas

mg/24 h	mg/24 h = mmol/24 h × 168.1	mmol/24 h = mg/24 h × 0.005949

Reference range

Unit	Adults
mmol/24 h	1.5 – 4.5
mg/24 h	252.1 – 756.4

Source: Pathology Harmony Group (ACB, IBMS, RCPath): Agreed Adult Clinical Biochemistry Reference Intervals, January 2011 · Last reviewed: 2026-10-14

Note from the source: 1.5-4.5 mmol/24 h. UK Pathology Harmony consensus of the Association for Clinical Biochemistry, the Institute of Biomedical Science and the Royal College of Pathologists.

Frequently asked questions

How do I convert Uric acid (24-h urine) from mmol/24 h to mg/24 h?

mg/24 h = mmol/24 h × 168.1. In the other direction: mmol/24 h = mg/24 h × 0.005949.

What is the reference range of Uric acid (24-h urine)?

For adults the range is 1.5 – 4.5 mmol/24 h (Pathology Harmony Group (ACB, IBMS, RCPath): Agreed Adult Clinical Biochemistry Reference Intervals, January 2011). Reference ranges differ between laboratories and partly by sex and age; use the range printed on your lab report.

Which units are used for Uric acid (24-h urine)?

Common units are mmol/24 h, mg/24 h.